Can I make a purchase on iTunes with my Greenlight card?

Yes! iTunes will accept your Greenlight card as a form of payment.

Made a purchase already but aren't seeing it show up in your app?

Your purchase may not show up for 2-3 weeks because iTunes has a unique billing policy, and sometimes they take longer to process purchases. Make sure you don't move money away from your iTunes Greenlight or delete it until your purchase shows up!

For more info about iTunes' billing policy, check out their website here.